Home / 21,679.47-29,920.77-15,649.62

Finding the Fourth Proportional to 21,679.47, 29,920.77 and 15,649.62

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Solution

The fourth proportional to 21,679.47, 29,920.77 and 15,649.62 is: 21,598.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.47 : 29,920.77 = 15,649.62 : x
  2. Step 2: Convert to fraction form
    21,679.47/29,920.77 = 15,649.62/x
  3. Step 3: Cross multiply
    21,679.47x = 29,920.77 × 15,649.62
  4. Step 4: Simplify right side
    21,679.47x = 468,248,680.61
  5. Step 5: Solve for x
    x = 468,248,680.61/21,679.47
  6. Step 6: Final answer
    x = 21,598.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.